Helena Christensen, 42

Helena Christensen is a photographer whose work has been featured in Nylon and Marie Claire. Last year, she posed for Reebok EasyTones wearing nothing but the sneakers. "I have no problems with showing my body," Helena revealed in Elle's January 2010 issue, adding, "I'm Danish. Everyone's naked on the beaches. We don’t really give a sh*t." She's also heavily involved in breast cancer fundraising.